DORIS JOHNSTONI. 



D. obvelata, if we may judge from the figure ; the under side of the cloak is never veined : 

 one of its chief peculiarities is the beautiful and regular cup formed by the branchial plumes ; 

 and the oral tentacles are slender and linear, more so indeed than in any other species with 

 which we are acquainted. 



The spawn of Doris Johnstoni is smaller and more waved at the margins than that of 

 D. tuberculata. It is of the same buff or yellowish colour. The cup formed by it has four 

 coils, and the ova are placed rather irregularly. It is deposited in the months of May and 

 June on the under side of stones near low-water mark. 



Fig. 1, 2, 3. Doris Johnstoni, different views. 



4. Portion of the cloak more highly magnified. 



5. A branchial plume. 



6. Dorsal tentacle. 



7. Spawn. 



8. A small portion of the same, showing the ova. 



